Voluntary Nystagmus.

Kim, Ji Soo; Moon, So Young; Kim, Kwang Ki; Hwang, Jeong Min

Case Report

Journal of the Korean Ophthalmological Society 2004;45(7):1211-1213.
Published online July 1, 2004.

Voluntary Nystagmus.

Ji Soo Kim, So Young Moon, Kwang Ki Kim, Jeong Min Hwang

¹Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
²Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea. hjm@snu.ac.kr

수의눈떨림

김지수 ( Ji Soo Kim ) , 문소영 ( So Young Moon ) , 김광기 ( Kwang Ki Kim ) , 황정민 ( Jeong Min Hwang )

Abstract

PURPOSE
We evaluated the clinical manifestations of voluntary nystagmus in three patients and verified the efficacy of video-oculography as a diagnostic tool to differentiate voluntary nystagmus from congenital or latent nystagmus. METHODS: Meticulous history taking and neuro-ophthalmologic examination were performed for three patients with voluntary nystagmus. Video-oculography was also performed in one patient. RESULTS: All of the three patients were young men in military service. Neuro-ophthalmologic examination was normal in all three patients, except for shaking of the eyes. Video-oculography in one patient showed 5~6 Hz pendular oscillation with an amplitude of 7~15 degrees and a peak velocity of 345.4 deg/sec, verifying that the oscillatory eye movement was composed of saccades and was not a nystagmus. CONCLUSIONS: In differentiating between voluntary and congenital nystagmus, video-oculography as well as history taking and neuro-ophthalmologic examination were very helpful.

Key Words: Neuro-ophthalmologic examination;Video-oculography;Voluntary nystagmus